package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

//自定义切面，实现公共字段自动填充处理逻辑
@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    //切入点
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut(){}
    //前置通知，在通知中进行公共字段的赋值
    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint){
        log.info("开始进行公共字段自动填充...");
        //获取到当前数据库操作的类型

        MethodSignature signature = (MethodSignature) joinPoint.getSignature();//获取方法签名
        AutoFill autoFill= signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType= autoFill.value();
        Object[] args = joinPoint.getArgs();
        if (args == null || args.length == 0){
            return;
        }
        Object entity = args[0];
        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();
        if (entity instanceof java.util.Collection || entity instanceof java.util.Map) {
            // 如果是集合或Map类型，不进行自动填充
            return;
        }
        if(operationType == OperationType.INSERT){
            //为4个公共字段赋值
            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class); //把方法名全部换成常量类，防止写错
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                //4.根据当前不同的操作类型，为对应的属性通过反射来赋值
                setCreateTime.invoke(entity,now);
                setCreateUser.invoke(entity,currentId);
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);
            }catch (Exception e){
                e.printStackTrace();
            }
        }else if(operationType == OperationType.UPDATE){
            try {
                //为2个公共字段赋值
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                //4.根据当前不同的操作类型，为对应的属性通过反射来赋值
                setUpdateTime.invoke(entity, now);
                setUpdateUser.invoke(entity, currentId);
            }catch (Exception e){
                e.printStackTrace();
            }
        }
    }
        //获取到方法参数(实体对想)

        //最后进行业务方法实现统一赋值

    }
